It is a hybrid between Chem's Sister (Chemdawg marijuana phenotype) and the Girl Scout Cookies clone. Forum Cut, which combine their best properties to create an extremely vigorous plant.
Chem's Sister is a Chemdawg with a fairly sativa development, and crossing it with the GSC produces a plant resulting from conical hybrid bearing, well branched and somewhat thin but robust stems, which grows very vigorous.
That is to say, Sister Cookies is compatible with both SOG and SCROG crops, and it develops wonderfully both indoors and outdoors, offering good results with little effort and without the need for high doses of fertilizers for marijuana